-
1.发明授权System for and method of accurately determining true bearings of radio frequency identification (RFID) tags associated with items in a controlled area 有权准确地确定与控制区域中的物品相关的射频识别（RFID）标签的真实轴承的系统和方法公开(公告)号：US09477865B2
公开(公告)日：2016-10-25
申请号：US14106368
申请日：2013-12-13
CPC分类号： G06K7/10415 , G01S3/16 , G01S3/46 , G01S13/75 , G01S13/751 , G01S13/825 , G06K7/10099 , G06K7/10128 , G06K7/10366
摘要： A radio frequency (RF) identification (RFID) tag reading system and method accurately determine true bearings of RFID tags associated with items in a controlled area. An RFID reader has an array of antenna elements and a plurality of RF transceivers. A controller controls the transceivers by steering a primary transmit beam over the controlled area by transmitting a primary transmit signal to each tag, and steering a primary receive beam at a primary steering angle by receiving a primary receive signal from each tag. The controller thereupon steers a plurality of secondary receive offset beams at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive offset signals from each tag, and by processing the offset signals to determine a true bearing for each tag.
摘要翻译： 射频识别（RFID）标签读取系统和方法准确地确定与受控区域中的项目相关联的RFID标签的真实轴承。 RFID读取器具有天线元件阵列和多个RF收发器。 控制器通过将主要发射信号发送到每个标签，并通过从主要转向角度接收来自每个标签的主要接收信号来控制主要接收波束来控制受控区域上的主要发射波束来控制收发器。 控制器随后通过接收来自每个标签的次级接收偏移信号，并且通过处理偏移信号来确定每个标签的真实方位，引导不同次级转向角处的多个副接收偏移波束偏离主转向角。
-
公开(公告)号：US09836630B2
公开(公告)日：2017-12-05
申请号：US14230482
申请日：2014-03-31
CPC分类号： G06K7/10415 , G01S3/16 , G01S3/46 , G01S13/75 , G01S13/751 , G01S13/825 , G06K7/10099 , G06K7/10128 , G06K7/10366
摘要： An RFID tag reading system and method accurately and rapidly determine true bearings of RFID tags associated with items in a controlled area. An RFID reader has an array of antenna elements and a plurality of RF transceivers. A controller controls the transceivers by steering a primary transmit beam over the controlled area to each tag, by steering a primary receive beam at a primary steering angle from each tag, by steering a plurality of secondary receive beams at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive signals from each tag, and by processing the secondary receive signals to determine a true bearing for each tag. Bidirectional communication between the reader and a tag is conducted over a single inventory round in which the tag is read a plurality of times by the primary and the secondary receive beams.
-
3.发明授权System and method of estimating true bearings of radio frequency identification (RFID) tags associated with items located directly underneath an overhead antenna array in a controlled area 有权估计与受控区域内直接位于架空天线阵列下方的物品相关联的射频识别（RFID）标签的真实轴承的系统和方法公开(公告)号：US09361494B2
公开(公告)日：2016-06-07
申请号：US14274141
申请日：2014-05-09
CPC分类号： G06K7/10415 , G01S3/16 , G01S3/46 , G01S13/75 , G01S13/751 , G01S13/825 , G06K7/10099 , G06K7/10128 , G06K7/10366
摘要： An RFID tag reading system and method estimate true bearings of RFID tags associated with items located in a scan zone directly underneath an overhead array of antenna elements. A controller energizes a plurality of diametrically opposite antenna elements to yield electric fields having polarizations, and switches each antenna element between mutually orthogonal polarizations. A primary transmit beam and a primary receive beam are steered at a primary steering angle over the scan zone, and a plurality of secondary receive beams are steered over the scan zone at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive signals from each tag, and by processing the secondary receive signals to estimate a true bearing for each tag.
摘要翻译： RFID标签读取系统和方法估计与位于天线元件的顶部阵列下方的扫描区域中的物品相关联的RFID标签的真实轴承。 控制器激励多个径向相对的天线元件以产生具有偏振的电场，并且在相互正交的极化之间切换每个天线元件。 主扫描区和主接收光束以扫描区域上的主要转向角转向，并且多个次级接收光束在不同的辅助转向角度的扫描区域上被转向，通过接收次级 从每个标签接收信号，并通过处理次要接收信号来估计每个标签的真实方位。
-
-
搜索结果
3 条记录 (耗时 0.012 秒)
